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Finding the Fourth Proportional to 117,249, 161,937.27 and 79,457.64

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Solution

The fourth proportional to 117,249, 161,937.27 and 79,457.64 is: 109,742.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,249 : 161,937.27 = 79,457.64 : x
  2. Step 2: Convert to fraction form
    117,249/161,937.27 = 79,457.64/x
  3. Step 3: Cross multiply
    117,249x = 161,937.27 × 79,457.64
  4. Step 4: Simplify right side
    117,249x = 12,867,153,302.24
  5. Step 5: Solve for x
    x = 12,867,153,302.24/117,249
  6. Step 6: Final answer
    x = 109,742.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.